Abstract
The Dry Diagonal (DD) is a wide corridor of open vegetation between the Atlantic and the Amazon Rain Forests, comprising three biogeographic domains: Chaco, Cerrado e Caatinga. The Brazilian Dry Diagonal (BDD) (Cerrado and Caatinga) represents 2/3 of the DD and it is characterized by a great seasonality in temperature and precipitation, which influences several biologic features of the or…